离轨帆弹性桅杆力学性能分析

Analysis of Mechanical Properties of the Elastic Boom of Drag Sail Device

采用有限元分析软件ABAQUS分析弹性桅杆几何参数对其力学性能的影响,为离轨帆弹性桅杆设计提供一定的理论依据。结果表明:增加壳体厚度、保持弧长不变,减小曲率半径以及增大壳体截面圆心角都能有效提高离轨帆自动展开能力及弹性桅杆支撑刚度;弹性桅杆的弯曲内部应力只与材料属性、曲率半径、缠绕半径以及壳体厚度有关;曲率半径减小、壳体厚度增加都会增大弹性桅杆的弯曲内部应力,有可能会导致弹性桅杆在缠绕时发生塑性变形。因此,在对弹性桅杆设计时,需综合考虑弹性桅杆几何参数对其展开能力以及缠绕性能的影响。

The finite element analysis software ABAQUS was used to analyze the influences of geometric parameters of the elastic boom on the mechanical properties,which provides a theoretical basis for the design of the boom of drag sail device.The results show that the automatic unfolding capacity of the drag sail device and the support stiffness of the boom are improved by increasing the shell thickness,decreasing the radius of curvature while keeping the arc length unchanged and increasing the central angle of shell cross section.The internal bending stress of the boom is only related to material properties,radius of curvature,and winding radius as well as shell thickness.The internal bending stress of the boom increases as the radius of curvature decreases and shell thickness increases,which leads to a plastic deformation when the elastic boom is winding.Therefore,the influence of the geometric parameters of the boom on the unfolding capacity and winding property should be taken into account comprehensively when designing the elastic boom.